In order to write the book, Wolff claims that after interviewing Trump in 2016, he gained "something like a semi-permanent seat on a couch in the West Wing."

Last year he also criticised the media for its anger over the President in a column he wrote for Newsweek.

But Trumpistas will doubtless point out that Wolff has previous when it comes to controversy, particularly surrounding the accuracy of his sources.

Wolff's signature subject is media organisations and the people who run them, and he often attempts to provide readers with an inside look at how things work.

The authors first best-selling book, Burn Rate: How I Survived the Gold Rush Years on the Internet, was published in 1999 and received heavy criticism after Brill’s Content magazine claimed several people quoted in his work said his quotes about them were inaccurate.

Wolff's also written columns in New York magazine about book editor Judith Regan and author Andrew Sullivan, both of whom argued against the way they had been portrayed.

Washington Post reporter Paul Fahri, described Wolff as someone “pushing the facts as far as they’ll go, and sometimes further than they can tolerate.”

Wolff isn't the first member of his family to dip his toe into the media waters; his father ran an advertising agency during the 1950s. Wolff began his own career by writing for magazines in New York and he also worked in early online media, crafting the weekly This Media Life column for the aforementioned New York magazine.

He's also written for Vanity Fair - a magazine which was the subject of a mistaken attack by Trump recently - and won the National Magazine Award for commentary in both 2002 and 2004. The second award was based on columns he'd written after going to Qatar to work as a war correspondent in 2003.

He was married to lawyerAlison Anthoine, however they separated in 2009 and he filed for divorce in 2014, allegedly without even telling her.

It was claimed he left her in order to start a relationship with Vanity Fair intern Victoria Floethe. The 64-year-old has four children.